And daniel h



WHITE & D111. BACON. CUTTER HEAD FOR WOOD TURNING MACHINES.

(No Model.)

No. 503,632. Patented Aug. 22, 1893.

UN TED STATES.

PATENT @FFICE.

SAMUEL WHITE, OF CHICAGO, ILLINOIS, AND DANIEL H. BACON, OF

NEW YORK, N. Y.

CUTTER-HEAD FOR WOOD-TU RNING MACHINES.

SPECIFICATION forming part of Letters Patent No. 503,632, dated August22, 1893.

Original application filed January 5, 1892, Serial No. 417,051. Dividedand this application filed January 3, 1893, Serial No.

457,129- (No modeLl Toall whom it may concern.-

Be it known that we, SAMUEL K. WHITE, residing at Chicago, in the countyof Cook, in the State of Illinois, and DANIEL H. BACON, residing in thecity, county, and State of New York, citizens of the United States, haveinvented certain new and useful Improvements in Cutter-Heads for WoodTurning Machines, of which the following is a specification, the samebeing a division of an application filed by us January 5, 1892, SerialNo. 417,051.

Our invention consists in an internally grooved cutter head, in whichthe enlarged shank of the cutter is loosely inserted in the internalgroove and is kept pressing against the outer edge of said groove bycentrifugal force, during the revolution of the cutter head.

One form of our invention is shown in the accompanying drawings, inwhich Figures 1, 2 and 3 are enlarged details of the improved cutterhead. Fig. 4 is a perspective view of the cutter head without thecutter.

Same letters indicate similar parts in the different drawings.

This cutter head consists of any desired number of internally grooveddisks, to each of which one or more knives may be secured. These disksmay be of the same or different diameter, as desired, and may beseparated or not by dummy disks, that is, d'sks without any cuttingblades, if desired, all of them being pressed firmly toward the shouldernear the end of the spindle, by a spring. As is well known to thoseacquainted with the art of wood turning, the character of the balus ter,chair leg, &c., which is cut, the number of projections and depressionsgiven to it and so on, will correspond largely with the pattern, whichis made by the fanciful arrangement of these cutter carrying disks anddummies.

The internally grooved cutter head consists primarily of disks R,provided with the internal groove 7, connected with the outside of thedisk by the slot d. In this groove and slot is secured the cutter Y,which is composed of a shank d, which fits closely in the slot d,

its projecting base 8 resting in the internal groove 7"; and its upsethead r" is made of any desired shape and suitably sharpened to do thenecessary amount of cutting of the wood. The internal groove 1" is madeconsiderably deeper than the projecting base 8 of the cutter, so thatwhen the binding plates Z, Fig. 3, are placed against the open side ofthe disks R, and the cutter head thus formed is mounted on the cutterhead spindle, the centrifugal force generated by the revolution of thespindle tends to keep this projecting base 3 pressing against the outerlimit of the groove; and hence the upset head of the cutter would be atthe farthest possible distance from the center of revolution, and thuscompensation for wearis made. When the knives are new, the set screw 2',running through the disk, into the groove r, presses against theprojecting base 8' of the cutter and counterbalances the centrifugalforce; but as the outer surface of the cutting lathe is ground away byrepeated sharpening, the loss of material is compensated by graduallywithdrawing the set screws 2, and thus allowing the centrifugal force toact in keeping the edge of the cutting tool at a distance from thecenter of the revolution, as above described.

We claim The above described cutter head, which consists of a diskprovided with internal grooves, in which the enlarged shank of thecutters is loosely inserted, and which grooves are of greater depth thansaid enlarged shank, whereby said shank constantly tends to pressagainst the outer edge of said grooves, under the action of centrifugalforce, during the revolution of the cutter heads, and provided with acompensating device, whereby the loss of material caused by sharpeningthe cutter is compensated by allowing said enlarged shank to approachnearer the edge of the groove, in proportion to the amount of said loss,substantially as described and shown.

SAMUEL K. WHITE. DANIEL H. BACON. Witnesses:

RUDOLF HERZ, ANNA M. HUGLE.

